Sofa bed



FIG. 1 is a front perspective view of a sofa bed embodying my new design, shown in bed position;

FIG. 2 is a front perspective view of a second embodiment of the sofa bed shown in FIG. 1;

FIG. 3 is a front perspective view of the sofa bed of FIG. 1, shown in sofa position; and

FIG. 4 is a front perspective view of the sofa bed of FIG. 2, shown in sofa position.

The characteristic feature of my design resides in the opposing relationship of a pair of identical sofas straddling the bed component when the sofa bed is in the bed position. 

The ornamental design for a sofa bed, as shown and described. 